HI Streams And Spurs In HALOGAS Observations Of NGC 5055

Details HI Streams And Spurs In HALOGAS Observations Of NGC 5055 HI Streams And Spurs In HALOGAS Observations Of NGC 5055

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934625p&link_type=abstract

American Astronomical Society, AAS Meeting #219, #346.25

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of a tilted-ring analysis of the HI in the nearby galaxy NGC 5055 (M63) from deep observations of the Westerbork Hydrogen Accretion in LOcal GAlaxieS (HALOGAS) survey. NGC 5055 is a moderately-inclined SAbc galaxy with a large pronounced warp of the extended gaseous disk. The HALOGAS observations reveal extended emission in the form of faint HI spurs and streams in the galaxy outskirts, which were undetected in previous data. We compare these features with stellar streams seen in recent deep optical imaging and with extended UV emission from GALEX. We also characterize anomalous velocity "beard” gas in the inner region of the galaxy, which suggests a lagging halo component that may be confined to the optical star forming disk.
RW acknowledges support from NSF grant AST-0908126 and from a grant from Research Corporation for the Advancement of Science.

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